The size of silver particles in a photographic emulsion is known to have a log normal distribution

Question:

The size of silver particles in a photographic emulsion is known to have a log normal distribution with a mean of 0.001 mm and a standard deviation of 0.002 mm.

(a) Determine the parameter values for the lognormal distribution.

(b) What is the probability of a particle size greater than 0.005 mm?

Distribution
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